I got Mark a little stick of dried salmon skin as a treat and at first he didn't go for it, only sniffed at it suspiciously. He later warmed up to it and dragged it around on the bed, then dropped it on my slippers when I was on the couch wrapping up some business on the laptop. We are now all in sleepy mode while he alternates gnawing on the stick and using my stomach as a trampoline for his demonic zoomies.
Looking forward to seeing what remains in the morning.